I am working on a small electronics prototype where I added some fins to the heatsink for better heat dissipation. The fins were 0.5mm thick and the first service I contacted said their process cant do walls that narrow and that I should bring them up to 1mm and resubmit my design. A lot of the online services I have found said they can go down to 0.5mm in thickness but want the average wall thickness to be 1mm. The problem with that is my project is so small the walls are currently set at 1mm. So I am hoping to find a service that is either okay with the 0.5mm fin design as is or would be willing to meet me somewhere in the middle and not force me to bring it all the way up to the full 1mm fins. If anyone has any ideas for some online services to look into that would be great of just some general advice.

Thanks in advanced, Jonathan